Package 4 network phones with central 20 lines and switch

Complete network central (central device with 4 network phones and 8-port switch and 2-line analog card) contents of the network central: Yeastar S20 VOIP PBX central Yealink SIP-T31P phones 4 number O2 Module switch HRUI HR901-AFG-82N speed 1 G suitable for small companies. Yeastar S20 is an independent PBX system with many business features that accommodate up to 20 users. It is designed to be easy to use and powerful in production. 20 users 10 simultaneous calls up to 4 FXS / FXO / BRI ports up to 1 GSM / 3G / 4G channel 20 VoIP Trunks